Heard the one about the blind white supremacist who doesn’t realize he’s actually black?

How about the “racial draft,” in which teams of Jews, Asians, Latinos and African-Americans trade for ethnically obscure celebrities like Colin Powell, Mariah Carey and Tiger Woods?

If not, then you haven’t been watching one of the surprise hits of the TV season, “Chappelle’s Show,” hosted by and starring the 30-year-old New York comic Dave Chappelle.

“The show pushes boundaries in such an intelligent way,” says fan Matt Iselin, 29, a physical therapist and keyboard player for the band Afroskull.

“It’s just hysterical. And in a sick kind of way, it almost makes it appropriate to say inappropriate things at work.”

Chappelle earned that rep with provocative, razor-sharp pieces like the one about the racial draft, in which the African-American team chooses Woods.

“Tiger has been discriminated against, he’s had death threats, and he dates white women,” explains a play-by-play announcer played by Chappelle.

“Sounds like a black man to me.”

In another much-talked-about skit, Chappelle spoofed Red Bull commercials with a fake ad for “Red Balls,” featuring a drug addict who uses the drink to generate bionic powers that allow him to steal a car radio and then break out of jail.

The half-hour sketch comedy series, which airs Wednesdays at 10:30 p.m. on Comedy Central, is getting huge ratings for the cable network – an average of 2.5 million viewers a week, just behind Comedy Central’s highest-rated show, “South Park.”

And, as on “South Park,” no celeb is safe.

An oft-repeated line from one sketch – “I’m Rick James’ bitch!” – could land in the same category as the Bart Simpson classic “Don’t have a cow, man!”

Back when that catchphrase was first printed on T-shirts, Chappelle was a 14-year-old comic in his native Washington, D.C., telling Jesse Jackson jokes in any club that would let him on stage.

Chappelle’s first fan was his mother, a Unitarian minister who encouraged his show-biz dreams and chauffered him to his gigs because she felt he was safer on stage than on the street, where crack was at its peak.

After high school, Chappelle moved to Manhattan and gigged at downtown comedy clubs before scoring roles in such movies as 1996’s “The Nutty Professor” and 1997’s “Con Air,” in which he played Pinball Parker, a rioting convict who meets his death after being ejected from an airplane.

He finally got his first major starring role as Thurgood Jenkins / Sir Smoke-a-lot in the 1998 pot comedy “Half Baked,” which is now a cult-classic among college kids.

Chappelle, who is married and has two children, co-wrote “Baked” with the white comic Neal Brennan, who is now a executive producer on “Chappelle’s Show.”

In each episode, the pair unabashedly tackle tough issues like racism and drug addiction thoughtfully – and cleverly.

Perhaps their first masterpiece was the black white-supremacist sketch from the first season, which was released on DVD last month.

“It was a fantastic sketch,” recalls Bill Hilary, Comedy Central’s executive vice president and general manager. “Chappelle had a very smart and important point to make: Anyone can be a racist.

“We were a little worried about it – not for its content but because it was nine minutes long, which is a long time for a sketch.